Rapid Deployment Aortic Valve Replacement: Excellent Results and Increased Effective Orifice Areas.

BACKGROUND

The aim of this study was to evaluate the effects of rapid deployment aortic valve replacement (RDAVR) on surgical outcome and hemodynamics compared with standard aortic valve replacement (AVR).

METHODS

One hundred sixty-three RDAVR patients (isolated, n = 67; combined with coronary artery bypass graft surgery [CABG], n = 96) were compared with a propensity matched control group (n = 163). Primary endpoints included association between valve type and procedure times, prosthesis size, transvalvular gradient, and indexed effective orifice area. Secondary endpoints were postoperative mortality and morbidity.

RESULTS

Aortic cross-clamp and cardiopulmonary bypass times in the RDAVR group were 55 ± 23 and 88 ± 38 minutes, respectively, compared with 77 ± 22 and 105 ± 38 minutes in the control group (p < 0.001). In the subgroup of patients undergoing isolated RDAVR (n = 67 of 163), the aortic cross-clamp and cardiopulmonary bypass times were 38 ± 13 and 66 ± 22 minutes, respectively, compared with 55 ± 14 and 81 ± 18 minutes in the control group (n = 67 of 163; p < 0.001). The RDAVR patients received larger prostheses (23.3 ± 1.8 mm) compared with standard AVR (22.8 ± 1.5 mm; p = 0.002). Mean transvalvular gradients and indexed effective orifice areas were 9 ± 5 mm Hg and 1.11 ± 0.11, respectively, in the RDVAR group compared with 13 ± 5 mm Hg and 0.95 ± 0.08 in the control group (p < 0.001). Hospital mortality was similar in both groups (1.8%, n = 3 of 163; p = 1.000). Postoperative pacemaker rates were 3.5% (n = 3 of 67) for isolated RDAVR versus 3.0% (n = 2 of 67; p = 0.649) for isolated AVR and 12.5% (n = 12 of 96) for RDAVR/CABG versus 4.2% (n = 4 of 96; p = 0.032) for AVR/CABG.

CONCLUSIONS

RDAVR facilitates reduced aortic cross-clamp and cardiopulmonary bypass times compared with standard AVR, particularly in patients undergoing concomitant procedures, allowing the use of larger prostheses and resulting in lower transvalvular gradients and higher indexed effective orifice area compared with standard AVR. Therefore, RDAVR may help to overcome patient-prosthesis mismatch in some patients.